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std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>::bucket_count

size_type bucket_count() const;
(since C++11)

Returns the number of buckets in the container.

Parameters

(none)

Return value

The number of buckets in the container.

Complexity

Constant.

See also

bucket_size
returns the number of elements in specific bucket
(public member function)
max_bucket_count
returns the maximum number of buckets
(public member function)

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https://en.cppreference.com/cpp/container/unordered_multimap/bucket_count

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